In 2005, $ 5.7 billion dollars was spent on search engine advertising. Out of this $ 4.71 billion dollars was pocketed by PPC advertising - that is a massive 81%!The figures prove the popularity of the PPC advertising model. Even now, as more and more advertisers hit the Internet marketplace, they are opting for PPC search engine advertising because they can advertise at a low cost and the hits start coming fast. So far the scenario has been good. For information sake, the average keyword cost on Google and Yahoo - the two big leaders in the PPC market - is 45 cents/keyword.But this influx of big playing advertisers is bound to push up keyword rates higher to a point when many small businesses will start feeling the pinch, and once keyword rates skyrocket, the whole PPC business is going t...